Spark intensifier



July 31; 1923. 1,463,530

A. A. HUTCHISON SPARK INTENSIFIER Filed Dec. 31, 1921 WITNESSS AITORNEYPatented July 3l, 1923.

UNITED STATES PATENToFFlcE.

ARTHUR A.. HUTCHISON, OF HARRISBURG, PENNSYLVANIA..

SPARK INTENSIFIER.

Application led December 31, 1921. Serial No. 526,275.

To all iwhom it may concern.

Be it known that I, ARTHUR A. HUTCHI- son, a citizen of the UnitedStates, residing at Harrisburg. in the county of Dauphin and StateofPennsylvania, have invented new and use-ful Improvements in SparkIntensifiers, of which the following is a speci cation.

This invention relates to improvements in spark intensifiers forinternal combustion engines.

An object of the present invention is the priwision of a sparkintensifier which is simple and compact in instruction and which isprovided with a novel form of sparking point, so arranged and held, thatit cannot become accidentally displaced and thus interfere with theproper functioning of the device` the means employed for insuringprevention of displacement also providing means for holding in positiona transparent cover, for a sight opening.

With the above and other objects in view, the invention further includesthe following novel features and details of construction, to behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claims.

ln the drawings r- Figure 1 is a plan view of a spark intensifierconstructed in accordance with the invention.

Figure 2 is an edge view of the same.

Figure 3 is a top plan view with the clamping member removed.

Figure 4 is a central longitudinal sectional view ofthe device.

Figure 5 is a plan view of the blank 'from which the clamping member isformed.

Figure 6 a detail perspective view of one of the conductor plates.

Referring in detail to the drawings, Where in like characters ofreference denote corre-4 sponding parts, the intensifier as showncomprises a body member which is termed of insulating material,preferably' fiber` and in cludes a base plate 10 and plates 11 and l2which are arranged upon the base plate in superimposed relation. Theplates 10, ll and 12 are preferably diamond shape in plan View and thetwo last mentioned plates are provided with aligned openings to form acentrally arranged sparking chamber 13. Secured between the plates 11and 12, are conductor plates 14 which are of triangular formation sothat their side edges will be flush with the sideedges of the plates 11and 12. Extending from the opposed edges of the plates 14 are spurs 15,Whose adjacent ends are spaced apart to provide a spark gap Within thechamber 13.

Each of the plates 10, 11, 12 and 14 are provided with openings and whenthese plates are assembled, the openings register to permit of thepassage of combined assembling and terminal eyes 16.` The oppositeedgesof these eyes are bent outward into engagement with the plates 10and 12 as indicated at Tso thatthe plates are clamped together, whilethe openings provided by the eyes form means f'or attachment to a sparkplug terminal and a conductor terminal.

The top of the sparking chamber 13 is closed by a transparent member 18,preferably formed of mica and this transparent member is held in placeby a clamping member 19. The clamping member is arranged transversely ofthe intensifier body and is provided With a centrally disposed offsetportion 20 having a sight opening 21 therein. This offset portion 20provides a space Vfor the reception of the transparent member 1d so thatthe latter will be securely held against accidental displacementWithoutproriding undue pressure upon its edges, which might crack ordestroy the plate and thus render it useless. The clamping member 19 isprovided with oppositely and radially ex tending arms 22, which are bentover the side edges and beneath the bottom of the intensifier body asshown so that the body portion of the clamping member forces or lampsthe intermediate portion ofthe plate 12 downwardly against the plate 11and between the opposed edges of' the conductor plates 14, as shown at23, so that'accidental pivotal movment of the conductor plates upon theeyes 16 is prevented. The spurs 15 which form the sparking points of the'ntensifier are thus rigidly and securely held in place so as to insureproper functioning of the device. In addition, the plate 18 serarelyrcovers the sparking chamber 13 so that the gasoline or other highlyexplosive `vapors will be prevented from entering the sparking chamber.

The invention is susceptible of various f-hanges in its form,proportions and minor details of construction and the right is hereinreserved to make such changes as properly fall Within the scope of theappended claims.

Having described the invention vwhat is claimed isz- 1. A sparkintensifier comprising a substantially diarnpnd shaped body formed ofsuperimposed layers of insulatin material and comprising a base plate,pV es ypositioned upon the hase plate and having oentrally arrangedregistering openings therein to provide a sparking chamber,substantially triangular shaped oondueto-r plates positioned between theinsulating plates, spurs extending from one iedge of each of theconductor plates and projeting` into the sparking ehamher to provide aspark gap, Combined assembling and Vterminal eyelets extending throughthe insulating plates and conductor plates and a transparent rover forthe sparking chamber.

y2. A spark intensiier comprising a substantially diamond shaped bodyformed of superimposed layers of insulating material and Comprisingr abase plate`^ plates positioned `upon the lease plate and Vhaving centrally arranged openingstherein to lprovide a sparking chamber,substantialhT triangular shaped conductor plates positioned between theinsulatingr plates, spurs extendingr from one .erige of each of theConductor plates and projectingr into the sparking chamber to provide aspark (gap, combined assembling and terminal eyelets extending throughthe insulatingV plates and eonductor plates, an apertured Clampingmember extending across the body and clamping the intermediate portionof the topmost insulating plate upon the next adjarent insulating plateto hold the conductor plates against accidental pivotal movement and atranspzvxreut cover positioned beneath the aperturei! Clamping member.

In testimony whereof I ailix my signature.

ARTHUR A. HUTCHISON.

